audit: convert audit_tree.count from atomic_t to refcount_t
authorElena Reshetova <elena.reshetova@intel.com>
Tue, 2 May 2017 14:16:04 +0000 (10:16 -0400)
committerPaul Moore <paul@paul-moore.com>
Tue, 2 May 2017 14:16:04 +0000 (10:16 -0400)
commit9d2378f8c8f1a3fcfab681fd90c139d90dca7b69
tree0c11cc5d48fbd6d44c6dd593b8ebdfa07f8adad2
parent2173c519d5e912a6e2934bb04255fcd36c1591c8
audit: convert audit_tree.count from atomic_t to refcount_t

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
[PM: fix subject line, add #include]
Signed-off-by: Paul Moore <paul@paul-moore.com>
kernel/audit_tree.c